Chimney housing and attic ventilator



I March 13, 1956 .J. H. SCHMIDT CHIMNEY HOUSING AND ATTIC VENTILATOR Filed May 31, 1952 INVENTOR. JACK H. SCHMIDT ATTORNEY United States Patent CHIMNEY HOUSING AND ATTIC VENTILATOR Jack H. Schmidt, Princeton, Ill., assignor to Richard F. Van Alstyne, Davenport, Iowa ApplicatiorfMay 31,1952, Serial No. 290,887

ACIaims. toms-46 .The present invention relates .to a chimney housing and cheaper to construct. The smoke carrier, or chimney proper, may be of any type desired and, therefore, no

'- particular construction-is-shown in the present drawings,

yet the present structure is designed for use especially with a construction shown and described in an application, Serial No. 290,900, of Richard F. Van Alstyne for patent on Chimney Construction, filed concurrently herewith, on May 31, 1952, but it is to be understood that its use is not limited to that one construction.

Among the objects of the present invention are to provide a housing for a chimney such as is shown and described in the application referred to above; to provide a housing which has the general appearance of a chimney; to provide extra strength for a chimney; to provide an attic ventilator with a counterflashing; and such further objects, advantages, and capabilities as will hereafter appear and as are inherent in the structure disclosed herein.

In the drawings annexed hereto and forming a part hereof,

Fig. 1 represents a vertical section taken along the plane indicated by the line 11, in Fig. 3;

Fig. 2 represents a vertical section taken along the plane indicated by the line 22, in Fig. 1; and

Fig. 3 represents a transverse section taken along the plane indicated by the line 33, in Fig. l.

In the structure shown in the annexed drawings, the lower ends of plates or boards 1 and 2 of asbestos are cut to fit the top of the roof and form a housing or enclosure in vertical register with a chimney opening in the roof. These plates or boards are known in the industry and can be cut to the desired sizes. The roof includes rafters 7 and headers 9, and sheathing 11 is carried by the rafters 7. Plates or fillers 3 are secured to V- shaped reinforcing plates 4, which have extensions 5, and then the reinforcing U-shaped plates are secured to the rafters through the headers 9, as best shown in Fig. l. The plates 1 and 2 are secured by reinforcement pieces or corners 6 of structural asbestos board, which pieces 6 are placed in the angles between the plates 1 and 2. These are shaped when wet and then placed in the angles. Alternatively, wet asbestos can be put into the angles and secured therein. The plates 1 and 2 are supported by the roof through flashing 8, referred to below and shown in Fig. 1.

The plates 3 of asbestos board can be secured to the side plates 2 to fill the space between the plates 2 and the reinforcing U-shaped plates which are continuous with the plates 4, forming a connection between the plates 2 and 5 for the purpose of reinforcing the structure. These plates of asbestos board 4 and 5 can be shaped as a part of the process of manufacture or, when wet, they may be bent into U-shape and then cured, as by being baked.

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'Theflashing 8 of L-s'haped' section and preferably made in two mating parts, is installed around the base of the The plates 3 are secured tothe plates 5. Since the plates 1 and 2 have their lower edges shaped to conform to the inclination of the roof, the enclosure formed by said plates has uphill and downhill sides (respectively left and right, Fig. 1), which applies also to the left and right portions of the flashing 8.

'Headers9 are arranged across the space between the rafters, and strips 10 are secured to the asbestos plates 1 and '2 to help mount the additional plates. After a chimney proper has been built up to a height above the roof, higher than will be reached 'bythe first section of the chimney housing, the latter is mounted as a unit around 'the chimney proper. When the lowest plate of the chimney housing is installed, the strips 10 are applied to furnish an inside support for the next higher plates 1 and 2, which are secuerd to the strips 10. When a section of chimney housing has been installed, a section of the chimney, proper, is built up, if needed before another extension of the chimney housing is added.

When this chimney housing is completed, there is formed between the chimney, proper, and the chimney housing a channel which opens into the attic at its lower end and into the outside atmosphere at its upper end, forming a passageway through which the air of the attic may be drawn 01?. This keeps the attic from becoming a collector for dampness.

While I have disclosed herein what is regarded as the preferred embodiment of this invention, it will of course be understood that the specific description of structure set forth above may be departed from by various modifications without departing from the spirit of this invention as disclosed herein and as defined by the appended claims.

Having now described my invention, I claim:

1. A chimney housing adapted to be supported on an associated roof structure comprising a plurality of upright plates secured together at their edges to form an annular enclosure for surrounding a chimney, a carrier member resting on the roof and receiving and supporting the lower edge portions of said upright plates, and a pair of U-shaped reinforcing plates within said enclosure and positioned approximately horizontally with two extensions of one reinforcing plate projecting toward the two extensions of the other reinforcing plate, both pairs of extensions being connected with two opposite plates of said plurality of upright plates, said U-shaped reinforcing plates having mounting means thereon extending below the lower edge portions of said carrier member for attachment to the associated roof structure below said carrier member.

2. A chimney housing as defined by claim 1 adapted for roof structure having a chimney opening defined in part by approximately vertical spaced apart headers, further characterized in that the mounting means comprises intermediate portions of said reinforcing plates depending between said extensions and through the chimney opening for attachment respectively to the adjacent vertical sides of said headers.

3. A chimney housing as defined by claim 1, further characterized in that said carrier member comprises flashing of L-shaped section having an upright flange and a roof-engaging flange, said upright flange lying interiorly of the associated upright plate and exteriorly of said extensions, and filler plates between and secured to said extensions and the associated upright plates of the chimney housing, to accommodate said upright flange.

4. A chimney housing construction comprising a pluralityof upright plates secured together at their edges to form an annular enclosure for surrounding a chimney and having their lower edge portions shaped and disposed to parallel an inclined roof structure provided with a chimneyopening with which said enclosure is in vertical register, said enclosure having opposed uphill and downhill sides corresponding to the roof inclination, an annular flashing member of L-shaped section adapted to be mounted on the roof structure in vertical register with the enclosure and chimney opening and having a marginal roof-engaging flange lying substantially'in a plane corresponding to the inclination *of the roof structure and supporting the upright plates at their lower edges and an annular upright flange extending within and being surrounded by said enclosure, a pair of U-shaped reinforcing plates at a level above the flashing member and facing each other within said housing and secured to certain of the upright plates, central portions of said reinforcing plates lying respectively proximate to the uphill and downhill upright plates and inwardly oflset respectively from said uphill and downhill upright plates to afford spaces respectively sufiicient to clear the opposed uphill and downhill portions of the upright flange of said flashing member, mounting means on said U-shaped reinforcing plates depending below said flashing for attachment to the roof structure below the flashing, and internal corner reinforcement lying respectively in the aforesaid spaces and above said uphill and downhill portions of the upright flange of the flashing member.

References Cited in the file of this patent UNITED STATES PATENTS 

